{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4fceddbdd133ce6061a31db7b2302911823c1f6d5f01a39bdf3b3ec27465244a",
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    "signer": "0x9d21CE6Fce92AA19683785584293d78CB94f54B3",
    "userId": "132035448"
  }
}